/Engine/Source/Runtime/Core/Public/Serialization/MemoryImage.h
Value of this struct should never be a valid unfrozen pointer (i.e. a memory address). We rely on real pointers to have lowest bit(s) 0 this days for the alignment, this is checked later. Unfortunately, we cannot use bitfields as their layout might be compiler-specific, and the data for the target platform is being prepared with a different compiler during the cook.
struct FFrozenMemoryImagePtr
uint64
Packed